-LRB- CNN -RRB- -- Investigators involved in the case of serial killing suspect Elias Abuelazam went to Louisville , Kentucky , on Monday to retrieve two of his bags , Michigan police said .

Abuelazam is suspected of slashing 18 victims in Michigan , Virginia and Ohio , killing five . He was arrested at Hartsfield Jackson International Airport in Atlanta , Georgia , last week as he was attempting to board a flight to Israel .

Abuelazam has agreed to be sent back to Michigan to face charges , but he remains in custody in Atlanta .

Michigan authorities have some two weeks to pick him up . As of Monday afternoon , police said they do not know how , or when , Abuelazam will be transported .

He traveled last week from Detroit , Michigan , to Louisville , before heading to Atlanta , police said . The airline company misplaced his luggage and the bags never made it to Atlanta , they added .

Michigan authorities said they took the two bags back with them .

Lt. Steven Sipes of the Michigan police declined to say what was in the luggage , but he added the bags are now part of the department 's investigation .

CNN 's Susan Candiotti contributed to this report .

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Elias Abuelazam remains in custody in Atlanta , Georgia

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Authorities are working to transfer him to Michigan

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He is linked to 18 stabbings in Michigan , Virginia and Ohio , police say